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FRANCIS E. BOYD AND P. SHELTON TYLER, 0F BOSTON, MASSACHUSETTS.

Letters Patent No. T3494, dated Jamiary 21, 1868. i

IMPROVEMENT IN BREEOH-LOADING FIRE-ARMS.

Be it known that we, FRANCIS E. Born and P. Snumon TYLER, of Boston, in the county of Suffolk, and State of Massachusetts, have invented a. new and useful Improvement in Breech-Loading Double-Bsrrelled Guns, of which the following is a full, clear, and exact description, reference being he d to the accompanying drawings, making a part of this specification, in which- Figure 1 represents a side elevation of a portion of a. douhle-barrelled gun embodying our invention.

Figure 2 is a plan view of the same.

Figure 3 is a section of the rear of the breech when closed, and

Figure 4 is a view of the breech when opened.

Figures 5 and 6 are modifications of our invention.

Similar letters indicate like parts in the several figures.

The object of our invention is to provide a. simple and efiicient means for securing the barrels of a. breechloading gun to the breech, so as to insure a. gas-tight connection,- and at the same time to enable the barrels to be readily turned upon the breech for loading; and the invention consists in the employment of alclamp attached to the rear of eachbarrel, and fitting over the edge' of the breech-plate, the latter being provided with'cam-shaped projections, in the rear, that serve to tighten up the clamps as they pass over-the breech-plate.

The invention also consists of a. washcrcrplate attached to the spindle upon which the barrelsturn, the said washer being formed with e curved portion on one side that bears against a roisediportion on one side of the plate through which the spindle passes, and which is attached to the under side of the barrels.

Referring to the drawings, a represents the stock, and b b the barrels of a double-barrelled gun. To the under side of the barrels are attached the plates I) d, which support the spindle c. and in which the said spindle freely turns. The spindle 0 is firmlysecured to the breech-plate 1. To the rear of each barrel, on the upper side, is attached a clamp, g, the same consisting of a. strip or plate of metal, formed with a projRtion'at their rear ends, fitting over the edges of the face-plate a, the latter being attached to the front end of the stoclca. The edges of the face-plate a project above the stock;- and are curved to correspond with the surface'of the barrels, so as to fit snugly under the projecting clamps gg. The projecting portion of the face-plate a is curved'in the rear on each side, as shown at a" a, in figs. 1 and 2, so that as the projecting ends of the clamps are brought over them, the barrels will be drawh up close to the faceplate a, and form a. tight joint. q On tho end of the spindle c, in front of the bearing-plate. d, is a circular disk or washer, c, confined by nut, The said washer turns with the spindle, and is foriued with a camdike projection on one side,:which is made to abut against a similar projection on the front side of the'beuring-pla'tc (Z when the barrels are closed upon the breech, and thus forman additional bearing-point for securing a. tight joint of the barrels upon the breech.

When in position, the barrels maybe secured to the breech by means of a spring-catch or other suitable device. The clamps g instead of being secured to the barrels, as above described, may be reversed and attached to the stock, their projecting ends engaging in cams attached to the barrels.

Figs. 5 and 6 show a modification of. our invention as adapted to barrels which slide longitudinally on the spindle, instead of turning on the spindle at one side for the insertion of,the. charge. The barrelsare scoured in a. closed position by means of a. sliding plate, on which are formed cams or projections, which engage with the projecting ends of the clamps in a manner similar to'the action of the faceplate before d scribe l.

Having thus described our invention, what-we claim as new, and desire to secure by Let ers Patent, is-

1. We claim the plate orwnsher e, formed as described, and attached to the spindlo' c, in combination with the raised or cum-shisped surf-acct)!- the bearing-plate d, as set forth. 7

2. We claim the combination of the clamps 9 9, and the-curved and cam projections of the face-plate, with the bearing-plate d and plate or disk 0, constructed and operating substantially as and for the purpose set forth..- In testimony whereof, we hgvc signed our names to this specification in the presence of two subscribing witnesses. FRANCIS E. BOYD, P. SHELTON TYLER. Witnesses: A

J. H. ADAMS, E. L. Dyna. 

